Brain research

Santiago Ramón y Cajal's drawings of nerve cells changed scientists' understanding of the brain. Now, 80 of those drawings are going on display at an art museum in Minnesota.

If your mom had to run through the name of everyone in the family, including the dog, before hitting yours, it's probably because you're all in a mental folder labeled "loved ones."

The National Academies of Sciences, Engineering and Medicine sorted through 10,000 studies to determine the good and bad health effects of marijuana. Tight drug restrictions impede research, they say.

From birth through age 30 or so, our ability to recognize faces keeps improving, research shows. At first, kids discern adult faces better than other kids' mugs. Not so after adolescence.

A magnetic pulse to a certain spot in the brain of healthy volunteers restored recently "forgotten" thoughts, researchers found. The study is shifting the understanding of short-term recall.

Troops returning from Iraq and Afghanistan are far more likely to develop post-traumatic stress disorder if they have suffered a concussion. The reason may be a change in the brain's fear circuits.

Studies suggest that smoking heavily in adolescence may affect brain function in adulthood, but there's a dearth of hard evidence for voters contemplating pot's long-term effects.